I have 2 qml files:
1 is main.qml when user write his name and click go button send the name to main.cpp file and main.cpp send the name statment to
2 showName.qml and hide main.qml and open showName.qml
how to do that?
main.qml
Qt Code: 
  1. import QtQuick 2.3
  2. import QtQuick.Window 2.2
  3. import QtQuick.Controls 1.2
  4.  
  5. Window {
  6.     visible: true
  7.  
  8.     TextField {
  9.         id: aName
  10.         placeholderText: qsTr("Enter your name")
  11.     }
  12.  
  13.     Button {
  14.         id: go
  15.         y: 50
  16.         text: qsTr("Go")
  17.     }
  18. }
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showName.qml
Qt Code: 
  1. import QtQuick 2.0
  2. import QtQuick.Window 2.2
  3. import QtQuick.Controls 1.2
  4.  
  5. Item {
  6.     Text {
  7.         id: aName
  8.         text: qsTr( aName )// aName come from main.cpp
  9.         font.pixelSize: 12
  10.     }
  11.  
  12. }
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main.cpp
Qt Code: 
  1. #include <QGuiApplication>
  2. #include <QQmlApplicationEngine>
  3.  
  4. int main(int argc, char *argv[])
  5. {
  6.     QGuiApplication app(argc, argv);
  7.  
  8.     QQmlApplicationEngine engine;
  9.     engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
  10.     // i want here to get aName from main.cpp, send aName to showName.qml, hide main.qml and show showName.qml 
  11.     return app.exec();
  12. }
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